Commercial Coffee Tamper Barista Espresso Tamper Coffee Grinder Stainless Steel. Material: Plastic + Stainless steel. Food grade stainless steel, more durable and environmentally friendly. The recommended filter diameter is 57.5mm or 58mm. There is a non-slip mat at the bottom, which is more intimate. The press reaches 25 kg and the cookware will jump off. 1 Coffee Tamper (not including coffee brewing handle).