VWR Vwr Mat Frame 25x31 30l Grey PF 2531 31 W03 Unit EA. The polystyrene frame comes with an non-skid backing allowing the Intro Mat to be moved or placed on surfaces that are not ideal for tacky mats. Frames are re-useable with a 24x30 Purestep refill. Specifications for VWR Vwr Mat Frame 25x31 30l Grey PF 2531 31 W03: Manufacturer: Advantech Manufacturing Available quantity options: Each Color: Gray Package Contents: VWR Vwr Mat Frame 25x31 30l Grey PF 2531 31 W03 / 89097-494 The VWR Vwr Mat Frame 25x31 30l Grey PF 2531 31 W03 is a quality addition to the Advantech Manufacturing lineup. For more great deals on Laboratory Consumables by Advantech Manufacturing please browse our Advantech Manufacturing Laboratory Consumables page. VWR Vwr Mat Frame 25x31 30l Grey PF 2531 31 W03 Unit EA