Our 9″ 7075 Aircraft Grade Aluminum D Cell Solvent Trap Kit includes 8 Stainless Steel K Cups (Direct Thread Only). This beast includes both thread mounts sizes (1/2 x 28″ and 5/8 x 24″) and has a 1.73″ Outer Diameter and 1.375″ Inner Diameter. A perfect solution and weight balance. This high grade solvent trap has a lip at the bottom of each stackable K-Style Storage Cup to ensure a tight seal. This allows the sealed compartments to store solvents, cleaning supplies and keep your valuables dry and protected.