Check the listing for details. Rocketarium Trident T172-18 Cluster Rocket Kit 1061. Condition: New. Listed at 30.95 USD. Skill Level: 3 The next step in a cluster rocket with payload section. This is a flying model based on the EnerJet 2250 sounding rocket originally produced in 1972. Trident Cluster Series features a payload bay and offers adventurous rocketeers the whopping lift power of three engine cluster flights. Specifications Length: 31.75" (81 cm) Diameter: 1.72" (44 mm) Weight: 6.32 oz. (182 g) Motor Mount: 3 x 18 mm. Recovery System: Parachute Projected Max Altitude: 840 ft. (275 m) Recommended Engines: 3 x A8-3, B4-4, B6-4, C6-5 Shipping: We combine shipping. Add more items from our store and combined shipping will apply automatically. Most orders will be delivered within 5 to 7 business days. Order are shipped on the 2nd business day (Monday - Friday) if order is placed before 2PM ET. Orders placed after 2PM will be processed on the next business day and will therefore take one more day.