The VT4887-AF Array Frame for suspending VT4887A or VT4881A enclosures in an array or for use as a bottom anchor on large arrays. Also enables ground-stacking up to 6 units. This array suspension frame is crafted of 6061 heat-treated aluminum. It includes 11 (eleven) attachment holes for shackles, each fitted with bronze bushings for long life. These holes are set on approx. 4" centers. Each hole has an I.D. (inner diameter) of 25.4 mm (1 in). Array frames are fitted with SAE Grade 8 bolts, 7075 Grade aluminum receiver blocks and steel quick release pins with stainless steel restraining lanyards. The VT4887-AF can be used to ground stack up to 8 enclosures. Weight: 36 kg (80 lbs).