Fit Checker Advanced 1:1 Package. VPES Materials for Checking Fit & Occlusal Contact. Ideal for: Fit-Checking Dentures and PFM (Porcelain-Fused-to-Metal) Restorations. 1:1 Package Contains: 1 Tube Base (50 g; 42 mL) and 1 Tube Catalyst (50 g; 42 mL). 50 gram tube base & 50 gram tube catalyst