7008 Multiple-walled insulating units of glass

7008 (01/1988-..) Multiple-walled insulating units of glass 70080011 (01/1988-12/1990) Insulating units, double-walled, coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer 70080019 (01/1988-12/1990) Insulating units, triple- and multiple-walled, coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer 70080020 (01/1995-..) Multiple-walled insulating units of glass, coloured throughout the mass, opacified, flashed or having an absorbent or reflective layer 70080021 (01/1991-12/1994) Insulating units consisting of two panels of glass sealed around the edges by an airtight joint and separated by a layer of air, other gases or a vacuum, coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer 70080029 (01/1991-12/1994) Multiple-walled insulating units of glass coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer (excl. 7008.00-21) 70080081 (01/1991-..) Insulating units consisting of two panels of glass sealed around the edges by an airtight joint and separated by a layer of air, other gases or a vacuum (excl. coloured throughout the mass, opacified, flashed or having an absorbent or reflective layer) 70080089 (01/1991-..) Multiple-walled insulating glass consisting of two panels of glass with an interlayer of glass fibre, and multiple-walled insulating glass consisting of three or more panels of glass (excl. coloured throughout the mass, opacified, flashed or having an absorbent or reflective layer) 70080091 (01/1988-12/1990) Insulating units, double-walled (excl. units of glass coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer) 70080099 (01/1988-12/1990) Insulating units, triple- and multiple-walled (excl. units of glass coloured throughout the mass 'body tinted', opacified, flashed or having an absorbent or reflecting layer)