Dear Welcome to bestoffer666? The recommended filter diameter is 57.5mm or 58mm. Material: Plastic + Stainless steel. Food grade stainless steel, more durable and environmentally friendly. Available in 57.5mm diameters. 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). Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday.