BISCUIT NO 20, (PK 100) - External Length : - - Box Quantity : 100. Biscuit jointing has proven to be one of the strongest, fastest, safest and most accurate ways to join hard and soft woods, plywood, composition boards etc. Compared to dowelling, biscuit joinery is faster and more precise. The biscuits are made of laminated beech which is then compressed before being die cut. Beechwood biscuits expand up to 20 per cent when in contact with a woodworking adhesive. (e.g. PVA Glue). Size. No.20. Packed in 100. Size; 60 mm x 23 mm x 4 mm KINDLY REMINDER: Delivery to the UK Highlands, Channel Islands, Northern Ireland, Isle Of Wight, Isle Of Man and the following postal code areas: BT, FK, KA (1-30), PA(1-49), PA(60-78),PA80, PH, PH(11-40), PH(41-44), PH(49-50), AB, IV, KW, ZE, GY(1-10), JE(1-5), PO(30-41), IM, IR, HS are excluded from our standard delivery charge and may incur extra costs.